Oil-pump.



No. 720,121. PATENTED FEB. 10.1903.

0. W. ENOS. OIL PUMP. APPLIQATION FILED MAY 24, 1902.

N0 MODEL.

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AM ullllllllllilllllllllllllllllllllllllllllllllfllllllallllllln No.720,121. PATBNTED FEB. 10, 1903. G. W. ENDS. OIL PUMP.

APPLICATION FILED MAY 24, 1902. H0 MODEL.

2 SHEETS-SHEET 2.

NITED STATES PATENT OFFICE.

CHARLES \V. ENOS, OF PEABODY, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TOJOHN BOETTNER, JR., OF PEABODY, MASSACHUSETTS.

OIL-PUMP.

SPECIFICATION forming part of Letters Patent No. 720,121, dated February10, 1903.

Application filed May 24, 1902. Serial No. 108,848. (No model.)

To all whom it nuzy concern:

Be it known that LCHARLES W. ENos,a citizen of the United States,residing at Peabody, in the county of Essex and State of Massachusetts,have invented new and useful Improvements in Oil-Pumps, of which thefollowing is a specification.

The object of this invention is to provide an oil-pump which isparticularly adapted for an oil-pump lubricator for steam-engines.

The invention consists of a plunger, an exteriorly-screw-threaded sleevemounted thereon, tappets adj ustably fastened to said plunger atopposite ends of said sleeve, a stationary nut engaging the screw-threadupon the exterior of said sleeve, and means to rock said sleeve withinsaid nut and cause said sleeve to alternately contact with said tappetsand impart areciprooatory motion to said plunger for the purposespecified.

The invention finally consists in the combination and arrangement ofparts set forth in the following specification and particularly pointedout in the claims thereof.

Referring to the drawings, Figure 1 is a central vertical sectionthrough an oil-pump constructed in accordance with my invention, aportion of the same being shown in elevation. Fig. 2 is a detailvertical section taken on line 2 2 of Fig. 4. Fig. 3 is a detail sideelevation of the screw-threaded sleeve, plunger, and rocker-arm. Fig. 4is a horizontal section taken on line 4 4 of Fig. 1 looking downwardlyin said figure. Fig. 5 is a section taken on line 5 5 of Fig. 1 lookingdownwardly in said figure. Fig. 6 is a side elevation of the parts shownin Fig. 5. Fig. 7 is a horizontal section similar to Fig. 4,illustrating myinvention as appliedto a plurality of plungers actuatedby a single reciproca tory slide and all of said plungers pumping from asingle reservoir.

Like'numerals refer to like parts through.- out the several views of thedrawings.

In the drawings, 10 is a standard adapted to be attached to the frame ofan engine.

11 is an oil-reservoir consisting of a base 12, a cylindrical glassoil-cup 13, fast to said base and provided with a top 14, said base,

top, and cup being joined together by a central rod 15, oil beingintroduced through the tubular filler 16 and sieve 17. The base 12 isprovided with a shank 18, fastened to the standard 10 by a set-screw 19.The base 12 is provided with a cylindrical horizontal oilpassage 20,extending thereaoross. A plunger 21 is located in said passage and isadapted to slide lengthwise thereof and through a packing-box 22 at theright-hand end thereof, Fig. 1. The plunger 21 is extended beyond thepacking-box to the right of said Fig. 1 and has a sleeve 23 rotatablymounted thereon. The sleeve 23 is provided upon its periphery with ascrew-thread 24, which engages a stationary nut 25, provided with across-bar 26, Fig. 4, said cross-bar being fastened by screws 27 27 tostandards 28, integral with the base 12.

A rocker-arm 29 is fastened bya set-screw 30 to the right-hand end ofthe sleeve 23. Said rocker-arm is preferably cylindrical incross-section, Fig. 5, and has a stud 31 adjustably fastened thereto bya set-screw 32 and provided witha handle 33, integral therewith, bymeans of which the rocker-arm 29 and sleeve 23 may be rocked by handwhen desired.

The plunger 21 is provided with a screwthread 34 to receive nuts 35 35,one of said. nuts being located at each end of the sleeve 23 and held inplace by set-nuts 36 36. The nuts 35 constitute tappets and may be adjusted toward and away from the sleeve 23, so

that as the said sleeve is rotated the distanceto which the plunger 21is reciprocated by said rotation, as hereinafter set forth, may beincreased or diminished. A rocking motion is imparted to the rocker-arm29 and to the sleeve 23 by a link 37, pivotally attached to the stud 31at one end -and to an arm 38 at the other end, said arm being rigidlyfastened to a reciprocating piece, such as the valverod 39 of an engine.

At the left-hand end of the passage 20 a connecting-pipe 40 is screwedinto the base 12 at one end and into an elbow 41 at the other end. Apipe 42 connects the elbow 41 to a two-way cook 43. The pipe 44 leadsfrom the cook 43 to the cylinder or steam-pipe of the engine which it isdesired to lubricate.

A tube 45 is fastened to the cook 43 and is turned downwardly at theouter end thereof, terminating above the filler 16. Aball checkvalve 46is provided in the connecting-pipe 40. A port 47 opens out of theoil-passage and is connected by a pipe 48 with the interior of theoil-reservoir 11. A check-valve 49, Fig. 2, is provided in the pipe 48.

The operation of the pump as a whole is as follows: The rocker-arm 29and sleeve 23 are given a rocking motion by the link 37, arm 38, andvalve-rod 39. As the sleeve 23 is rocked and as the nut 25, with whichsaid sleeve has screw -threaded engagement, is stationary, said sleevemoves toward the right and left, Fig. 1, and abuts alternately againstthe tappets 35, thus imparting to the plunger 21 a reciprocatorymovement lengthwise of the oil-passage 20. As the plunger moves towardthe right, Fig. 1, avacuum will be formed in the oil-passage between theend of the plunger and the check valve 46. As soon as the lefthand endof the plunger passes toward the right beyond the port 47 oil will enterthe passage 20 through the pipe 48 from the oilreservoir 11. As thedirection of motion of the plunger 21 is reversed, so that said plungermoves toward the left, Fig. 1, a portion of the oil in the passage 20will be forced past the check-valve 46 and through the elbow 41, pipe42, cock 43, and pipe 44 to the cylinder of the engine or to thesteam-pipe connecting with the valve-chest of said engine. Thus it willbe seen that at each stroke of the engine a small amount of oil isdriven from the pump to the cylinder of the engine, and this amount maybe regulated according to the distance that the plunger 21 isreciprocated by the sleeve 23 and rocker-arm 29, and this distance maybe increased or diminished by adjusting the tappets 35 toward or awayfrom the sleeve 23 and also may be further adjusted by moving the stud31 upon the rockerarm 29 toward'or away from the plunger 21, it beingevident that the nearer said stud is brought to the sleeve 23 andplunger 21 the greater will be the angle through which said rocker-armwill be rocked for a given motion of the valve-rod.

While I prefer to use the pipe 48 and checkvalve 49 therein, said pipemay be dispensed with and the oil allowed to enter the passage 20 fromthe reservoir 11 directly through the port 47; but in the latter casethe plunger 21 will not force oil through the pipe 42 until theleft-hand end of said plunger has closed the port 47, while with thepipe 48 and checkvalve 49 attached to the base 12 the plunger will beginto force the oil through said pipe 42 immediately upon the commencementof the motion of the plunger 21 toward the left in Fig. 1. By turningthe two-way cock from the position shown in Fig. 1 to a position atright angles thereto the oil may be forced through the pipe 42 and tubeinstead of through the pipes 42 and 44, as hereinbefore described, sothat at each stroke of the engine it may be seen whether the pump isoperating as desired, thus forming a convenient means of testing thesame.

It will be seen that the construction hereinbefore described is verydurable and simple and may be adjusted to a nicety in order to obtainthe desired amount of oil at each stroke of the engine. It will again beseen that by detaching the link 37 from the stud 31 the oil may bepumped by hand by rocking the rocker-arm 29 by means of the handle 33,this often being a desirable feature in devices of the constructionhereinbefore set forth. It will also be seen that by disconnecting thelink 37 from the stud 31 the sleeve 23 may be rotated by means of therocker-arm 29 and handle 33 and withdrawn, together with the plunger 21,from the base 12, leaving the oilpassage 20 entirely open from theright-hand end thereof, so that the same may be readily cleansed and sothat the check-valve 46 may also be reached for the purpose of cleansingthe same.

In Fig. 7 I have illustrated a modified form of my invention in which asingle oil-reservoir supplies a plurality of oil-pumps, said oilpumpsbeing connected by a plurality of pipes to two or more cylinders. In theparticular form illustrated in Fig. 7 only two pumps or plungers areillustrated; but it is evident that the number may be increased to anydesired extent by increasing the size of the reservoir. In the formillustrated in said Fig.7 the rockerarm 29, sleeve 23, nut 25, tappets35, and setnuts 36 are duplicates of the form illustrated in Fig. 1; butinstead of attaching the tappets 35 and sleeve 23 directly to theplunger of the pump said tappets and nuts have screwthreaded engagementwith a reciprocatory rod 50, the sleeve 23 being rotatably mounted uponsaid rod. The left-hand end of the rod 50, Fig. 4, is fastened to across-bar 51, fast to the plungers 52 52, said plungers operating thesame as the plunger 21, hereinbefore described, to force oil throughpipes 53 5357 57 and each plunger reciprocating in oil-paspages 54 54,formed in the base 55. Each of the oil-passages 54 is connected bya portwith the interior of the oil-reservoir 56, said port being preferablyconnected by pipes 58 to the interior of said reservoir, each of saidpipes 58 being provided with a check-valve, as hereinbefore describedwith reference to the pipe 48 and check-valve 49.

While I prefer to attach the tappets 35 to the plunger 21 or to the rodby screw-threading said plunger or rod and holding said tappets inposition upon the plunger by means of set-nuts, for the reason that suchconstruction affords an accurate means of determining the amount of playgiven to the sleeve 23 before abutting against the tappets, ashereinbefore described, it is evident that said tappets may beconstructed as collars, the screwthread upon the plunger 21 being leftoff and said collars fastened to the plunger by set- I screws withoutdeparting from the spirit of my invention.

Having thus described my invention, what I claim, and desire by LettersPatent to secure, 1s

1. In an oil-pump, a plunger, a screw rotatably mounted thereon, tappetsfast to said plunger at opposite ends of said screw, a stationary nuthaving screw-threaded engagement with said screw, and means to rock saidscrew within said nut and impart a reciprocatory motion to said plungerfor the purpose specified.

2. In an oil-pump, a plunger, an exteriorlyscrew-threaded sleeve mountedthereon, tappets adj nstably fastened to said plunger at opposite endsof said sleeve, a stationary nut engaging the screw-thread upon theexterior of said sleeve, and means to rock said sleeve within said nutand cause said sleeve to alter-' nately contact with said tappets andimpart a reciprocatory motion to said plunger for the purpose specified.

3. In an oil-pu mp, a plunger, an exteriorlyscrew-threaded sleevemounted thereon, tappets having screw-threaded engagement with saidplunger at opposite ends of said sleeve, a stationary nut engaging thescrew-thread upon the exterior of said sleeve, a rocker-arm fast to saidsleeve, and means to impart a rocking movement to said rocker-arm,whereby a reciprocatory motion is imparted to said plunger for thepurpose specified.

4. In an oil-pump, a plunger, an exteriorlyscrew-threaded sleeve mountedthereon, tappets having screw-threaded engagement with said plunger atopposite ends of said sleeve, a stationary nut engaging the screw-threadupon the exterior of said sleeve, a rocker-arm fast to said sleeve, astud adj ustably fastened to said rocker-arm, and a link pivotallyconnected to said stud and adapted to be pivotally connected to areciprocatory valve-rod.

5. In an oil-pump, a plurality of plungers, a reciprocatory rod fast tosaid plungers, an exteriorly-screw-threaded sleeve mounted upon saidrod, tappets fast to said red at opposite ends of said sleeve, astationary nut engagipg the screw-thread uponthe exterior of said sleeveand means to rock said sleeve within said nut and cause said sleeve toalternately contact with said tappets and impart Witnesses:

CHARLES S. GOODING, JOHN BOETTNER, Jr.

